Influence of Long-Term Feeding of Limited Amounts of Phosphorus on Dry Matter Intake, Milk Production, and Body Weight of Dairy Cows

• Published in: Journal of dairy science Vol. 82; no. 10; pp. 2157 - 2163
• Main Authors: Valk, H., Šebek, L.B.J.
• Format: Journal Article
• Language: English
• Published: Savoy, IL Elsevier Inc 01.10.1999; Am Dairy Sci Assoc; American Dairy Science Association
• Subjects: animal health; Animal Nutritional Physiological Phenomena; Animal productions; Animals; Biological and medical sciences; Body Weight; Cattle - physiology; Chenopodiaceae; dairy cows; Diet; dry matter; duration; Eating; energy intake; feed conversion; feed intake; feed requirements; Female; Fundamental and applied biological sciences. Psychology; Health Status; ID Lelystad, Institute for Animal Science and Health; ID-Lelystad, Instituut voor Dierhouderij en Diergezondheid; Lactation; lactation stage; lactose; milk fat percentage; milk protein percentage; milk yield; mineral nutrition; Mother. Fetoplacental unit. Mammary gland. Milk; nutrient deficiencies; Nutritional Requirements; phosphorus; Phosphorus - administration & dosage; phosphorus requirement; Poaceae; Pregnancy. Parturition. Lactation; recommended dietary intakes; Reproduction; Silage; Terrestrial animal productions; Vertebrates; Vertebrates: reproduction; Zea mays; Netherlands; Europe; P67; BD; DVE; phosphorus requirement; LP; P100; LPBD; feed intake; HP; dairy cows; P80; milk yield; Farming animal; Lactation; Ruminant animal; Animal feeding; Long term test; Body weight; Dairy cattle; Ox; Cow; Milk production; Nutrient requirement; Dietary allowance; Vertebrata; Mammalia; Health status; Sodium phosphate; Food intake; Phosphorus compound; Yield; Artiodactyla; Ungulata
• ISSN: 0022-0302; 1525-3198
• DOI: 10.3168/jds.S0022-0302(99)75459-7

For almost two lactations, 24 high-yielding, multiparous dairy cows were fed a basal diet and concentrate mixtures with three different P concentrations. The basal diet consisted of grass (silage or artificially dried), corn silage, wet beet pulp, straw, and concentrates. The concentrate mixtures differed only in P content by varying the amount of monosodium phosphate. The number of cows and the amount of dietary P, expressed as a percentage of current recommendations in the Netherlands were: 6 cows, 100% (P100); 9 cows, 80% (P80); and 9 cows, 67% (P67). This resulted in dietary P concentrations of 3.3, 2.8, and 2.4 g/kg of dietary DM for the P100, P80, and P67 treatments, respectively. The trial lasted for 21 mo, including two lactations and two dry periods. Feed intake of the P67 group was reduced significantly during the first dry period. Dry matter intake, milk yield, and body weight were all reduced with the low P treatment during the second lactation. Phosphorus had no effect on reproductive performance. Between P100 and P80, no effect on any of the variables in this trial was observed. Results suggests that the diet with 2.8g of P/kg of dietary DM proved to be sufficient to meet the P requirement of dairy cows producing approximately 9000kg of milk per lactation.